
public class shuangchongxunhuan {

    public static void main(String[] args) {
 
    
        for (int hour = 0; hour < 3; hour++) {
            for (int i = 0; i < 4; i++) {
                // `0时0分`
                System.out.println(hour + "时" + i + "分");
                
            }

            
        }
   
    


    }
}